Re: [gentoo-user] USB stick recognition problem
On 02/02/2011 04:48:40 PM, Paul Hartman wrote: On Mon, Jan 31, 2011 at 3:43 AM, Helmut Jarausch jarau...@igpm.rwth-aachen.de wrote: Hi, since a few weeks I have a strange effect with my USB stick. According to fdisk there is one partition on it /dev/sde1 38 7839719 3919841 b W95 FAT32 which I haven't changed for a long time. Whenever I insert this stick, the kernel log shows /dev/sde but not /dev/sde1 (and there is no file /dev/sde1) After Invoking fdisk /dev/sde with a simple 'p' command but nothing else, this device shows up. Has anybody an idea what's going on here? I have a USB SD-card reader which cannot read the partition table when first inserted into the PC. But, if I issue hdparm -z /dev/sdg then the kernel re-reads the partition table and everything works fine after that. You can try it, maybe it'll work for you, too. Thanks Paul and all other who tried to help. Sorry for my late reply, I have been too busy. My situation seems special. - the card reader is 2 years old (builtin) - the stick is about 1 year old 2 of my 3 USB stick work just fine up to kernel 2.6.36-? the stick in question has worked definitely. Probably since kernel 2.6.37 this one shows the mentioned problems. Paul's advice above works just fine! So, I think it's a timing problem as Paul has suggested in a later mail. Where can I set the delay_use option of usb-storage to a higher value? Many thanks again, Helmut.
Re: [gentoo-user] USB stick recognition problem
On Fri, Feb 4, 2011 at 8:48 AM, Helmut Jarausch jarau...@igpm.rwth-aachen.de wrote: On 02/02/2011 04:48:40 PM, Paul Hartman wrote: On Mon, Jan 31, 2011 at 3:43 AM, Helmut Jarausch jarau...@igpm.rwth-aachen.de wrote: Hi, since a few weeks I have a strange effect with my USB stick. According to fdisk there is one partition on it /dev/sde1 38 7839719 3919841 b W95 FAT32 which I haven't changed for a long time. Whenever I insert this stick, the kernel log shows /dev/sde but not /dev/sde1 (and there is no file /dev/sde1) After Invoking fdisk /dev/sde with a simple 'p' command but nothing else, this device shows up. Has anybody an idea what's going on here? I have a USB SD-card reader which cannot read the partition table when first inserted into the PC. But, if I issue hdparm -z /dev/sdg then the kernel re-reads the partition table and everything works fine after that. You can try it, maybe it'll work for you, too. Thanks Paul and all other who tried to help. Sorry for my late reply, I have been too busy. My situation seems special. - the card reader is 2 years old (builtin) - the stick is about 1 year old 2 of my 3 USB stick work just fine up to kernel 2.6.36-? the stick in question has worked definitely. Probably since kernel 2.6.37 this one shows the mentioned problems. Paul's advice above works just fine! So, I think it's a timing problem as Paul has suggested in a later mail. Where can I set the delay_use option of usb-storage to a higher value? I think you must first ensure usb-storage is built as a module, then create a file /etc/modprobe.d/usb_storage with these contents: options usb_storage delay_use=5 That would set the delay to 5 seconds. And you may need to run update-modules after changing that file. I haven't tried it yet and that's based on my memory as I'm using a Windows computer at the moment... Good luck!
Re: [gentoo-user] USB stick recognition problem
On Fri, 4 Feb 2011 09:52:12 -0600, Paul Hartman wrote: So, I think it's a timing problem as Paul has suggested in a later mail. Where can I set the delay_use option of usb-storage to a higher value? I think you must first ensure usb-storage is built as a module, then create a file /etc/modprobe.d/usb_storage with these contents: options usb_storage delay_use=5 You can set options for built in modules too, by adding them to the kernel line in your boot loader, e.g. usb_storage.delay_use=5 -- Neil Bothwick Celery is not food. It is a member of the plywood family. signature.asc Description: PGP signature
Re: [gentoo-user] USB stick recognition problem
On Mon, Jan 31, 2011 at 3:43 AM, Helmut Jarausch jarau...@igpm.rwth-aachen.de wrote: Hi, since a few weeks I have a strange effect with my USB stick. According to fdisk there is one partition on it /dev/sde1 38 7839719 3919841 b W95 FAT32 which I haven't changed for a long time. Whenever I insert this stick, the kernel log shows /dev/sde but not /dev/sde1 (and there is no file /dev/sde1) After Invoking fdisk /dev/sde with a simple 'p' command but nothing else, this device shows up. Has anybody an idea what's going on here? I have a USB SD-card reader which cannot read the partition table when first inserted into the PC. But, if I issue hdparm -z /dev/sdg then the kernel re-reads the partition table and everything works fine after that. You can try it, maybe it'll work for you, too.
Re: [gentoo-user] USB stick recognition problem
Hi Helmut, It sounds like there is a problem with the partition table on your USB stick. It might be the consequence of a hardware failure (read or more probably write) at some point. If, as you mention, once you do an fdisk then p, you can use once again your USB stick, then maybe save everything you have on it, then create a new partition table using fdisk on that disk and format the whole thing. Hope that helps, Greg On Mon, Jan 31, 2011 at 10:43 AM, Helmut Jarausch jarau...@igpm.rwth-aachen.de wrote: Hi, since a few weeks I have a strange effect with my USB stick. According to fdisk there is one partition on it /dev/sde1 38 7839719 3919841 b W95 FAT32 which I haven't changed for a long time. Whenever I insert this stick, the kernel log shows /dev/sde but not /dev/sde1 (and there is no file /dev/sde1) After Invoking fdisk /dev/sde with a simple 'p' command but nothing else, this device shows up. Has anybody an idea what's going on here? Many thanks for a hint, Helmut.
[gentoo-user] USB stick recognition problem
Hi, since a few weeks I have a strange effect with my USB stick. According to fdisk there is one partition on it /dev/sde1 38 7839719 3919841b W95 FAT32 which I haven't changed for a long time. Whenever I insert this stick, the kernel log shows /dev/sde but not /dev/sde1 (and there is no file /dev/sde1) After Invoking fdisk /dev/sde with a simple 'p' command but nothing else, this device shows up. Has anybody an idea what's going on here? Many thanks for a hint, Helmut.
